I have an interest in the M0+ single-cycle IO Bus interface.

It seems that while the TRM describes a 32-bit bus, and a memory map it isn't clear if there is also an address bus to go along with this.

When instantiating do we have an IO address bus,…

Sir,

I am working on Cortex-M4 over serial wire debug protocol, i am able to read IDCODE(0x2ba01477) which is correct as per arm cortex m4 technical reference manual, and i am writing 0x50000000 to CTRLSTAT register to enable CSYSPWRUPREQ and CDBGPWRREQ…

HI,currently i am working on project based on stm32f407 chip.my development work has been stopped since two days as i have stuck in hard fault handler. Please  guide me how to trace the fault ???i tried every possible way i could.but result in nothing…

Hi all,

I am looking for developing an IP camera based system based on STMicroelectronics STM32. The way it is supposed to work is:

STM32F4 will have few IP cameras connected to it. It may have a web server running so it can be accessed from outside…

Greetings,,

what happens if FAULTMASK is set in cortex-m3/m4 and one or more serious fault happened like bus fault, MPU violation, invalid instruction, stack corruption.. etc will the processor enter a lockup? if not what would be the status of the processor…

Hi,

When I read the following on Cortex M4F, I don't understand the blue phrase on the uDMA process.

1. Why does it selects the lesser? The arbitration size matters uDMA services here?

2. I remember that DMA burst cannot be interrupt, even by high priority…

Hi,

I'm making test some on the famous LPC1114FN28 is there somebody who have some experience about it ?
Please, thank for sharing here

Here is the beast

And the pinout informations

Greetings,

sir/madam i am working on serial wire debug protocol. I was implemented serial wire debug protocol, which was successfully tested for used controllers like xmc1100,xmc4500..etc, when i tried to Access the control on newer controller i.e xmc1100…

I have a source file, converted it to assembly and added 2 instructions and generated the final elf. When I load this final elf, symbols doesnt match the source due to assembly instructions addition.

Is there a way to align them ? am using ARM cortex-M4…

Hi, i'm working with the ATSAM20DJ18A (using ASF) and i'm doing some temperature monitoring. But it seems like I'am stucked at 169 degre celsius. Is there a way maybe by changing the ADC reference to mesure 200 degre celsius?

Regards,

I'm searching for microcontrollers for a real-time motor control application. I see a lot of Cortex-M solutions for handling this, but why don't we see a lot of Cortex-A solutions specifically targeted for this?

Is there something inherent to the…

Hello All,

I am using Cortex M0 based controller and want to know if the following issues can happen and what can be the possible solution by software to handle the issues:

1. ALU resulting wrong result run time.

2. Register access giving wrong results run…

Dear Friends

                   I am very new to Embedded World especially Arduino and ARM micro controllers. I need to  measure square wave freq upto 8 Mhz using arduino. Can any one guide me in this regard.... Now I am able to measure upto 110 KHz. Here…

Hi everyone!!! i'm new to STM32f4. i was wondering if this microcontroller can amplify an input analog signal through audio jack i.e an audio signal and produce amplified voltage at any gpio pin...

Now we are thinking of using cortex M4 based MCU in custom board design, can I know is there any opensource IDE/Toolchain available?

Is there any other opensource cross compilation tool chain available for  cortex M4 ?

thanks and regards,

Jeevan

Hello,

         I have been using CMSIS library for implementation of DSP functions in ARM, however, CMSIS have very limited DSP functions. Although GNU has many DSP functions which CMSIS do not, It only have floating point implementation. I am trying…

Hi Guys, I've just started programming in Assembler on the ATMEL SAM E70 Cortex M7 microcontroller.

Is there any assembler code snippets for Sam E70 for me to check out.

I'm an assembler programmer for years now and have just started on ARM Cortex assembler…

I have seen that lot of arm boards are having qnx rtos but all were like cortex-a or cortex-r ,but the soc i have is having cortex-m3 ,so before investing lot of time in this os ,i want to be sure whether at the end it will work with cortex-m3 or not…

Hi, I wanted to  start learning RTOS in ARM Cortex M Processors. I currently work on Cortex M0 IC provided by Nuvoton where I use the BSP to get things done.

Now I need to move a step ahead and start learning RTOS and Implement it .

I had gone through…

I have  to do project on MMC card interfacing and Audio Player on ARM CORTEX M3 ..which hardware and software should I use for it?

how should i start the project...steps to be followed...I am new to this field ...pls help me.

Hi

I'm using a kinetis K64 cortex M4 with FreeRTOS and I need to compress files on a SD card. I have 100-150ko free Ram.

Do you know a library for this ? I found only solutions with 1Mo minimum RAM requirement.

It's csv files. I have a lot of time available…

Hello everybody,

im using the Math.h file to do a rfft with 1024 points und q15 datatype.

So far everything works fine, and I get good results. It needs a computation time of ~720us on my CortexM4 @100Mhz.

This is very Impressive, but to long for my application…

Hi,

I want to use the wfi instruction in my code. I'm sending a command to a module and wait for the reply.

I have configured UART communication with the module. Will it be good to use wfi() instruction? I know that it will turn  the cpu to power down…

I am looking for some alternative of J-Link Segger for Cortex-M3/4 , the cheapest one is J-Link Base as J-Link Lite can be used only with evaluation boards, 

Any suggestion ?

I am using GNU arm gcc as toolchain and debugger and Eclipse as IDE, I…